Solid-state resistor for pulsed power machines
| DWPI Title: Solid-state charge resistor for use in pulsed power machines for e.g. fast voltage-divider probes, has insulating outer shell for enclosing string of ceramic resistors, where insulating oil encapsulates string of ceramic resistors |
| Abstract: A flexible solid-state resistor comprises a string of ceramic resistors that can be used to charge the capacitors of a linear transformer driver (LTD) used in a pulsed power machine. The solid-state resistor is able to absorb the energy of a switch prefire, thereby limiting LTD cavity damage, yet has a sufficiently low RC charge time to allow the capacitor to be recharged without disrupting the operation of the pulsed power machine. |
| Use: Solid-state charge resistor for use in pulsed power machines for fast voltage-divider probes, charging/trigger resistors in Marx banks, dummy loads, absorbers of reflected pulses and capacitor bank dumps. |
| Advantage: The resistor provides higher resistance values to limit an amount of current that can be passed through the ceramic resistors without causing electrochemical gas formation inside the resistor. The ceramic resistors are stringer together and conducted through a body of the resistor to maximize energy capacity. |
| Novelty: The resistor (30) has an insulating outer shell for enclosing a flexible string of ceramic resistors (31). Insulating oil (34) is contained within the outer shell and encapsulates the string of the ceramic resistors, where resistance of the ceramic resistors is greater than 50 kohm. Pairs of negatively and positively charged capacitors are connected in series with a separate switch positioned vertically between the negatively and positively charged capacitors and for holding the 200 kilovolt potential difference. |
| Filed: 2/11/2015 |
| Application Number: US14619536A |
| Tech ID: SD 12814.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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